Pretty much all consumer RAM vendors offer a lifetime warranty. Not exactly a marketing gimmick.

G.Skill, lifetime warranty: https://www.gskill.com/warranty

Corsair, lifetime warranty: https://help.corsair.com/hc/en-us/articles/360033067832-Warr...

Kingston, lifetime warranty: https://www.kingston.com/en/company/warranty

Teamgroup, lifetime warranty: https://support.teamgroupinc.com/en/support/warranty.php

Oh, your RAM died? That means its lifetime ended at that moment, and so did the lifetime warranty. Is there anything else we can help you with today?

Hewlett Packard had a lifetime warranty on their network gear back in the day.